Talk about the Unsafe class in Java

1, Introduction to Unsafe class If you have seen the source code of JUC, I believe you will not be unfamiliar with the Unsafe class. The bottom core of the whole JUC is the Unsafe class. The Unsafe class is located in sun A class under misc package, which is a tool class (underlying c + + implementation) provided by jdk to directly access oper ...

Posted by juliston on Tue, 08 Mar 2022 03:18:42 +0100

Spring learning notes

This article is a personal note based on the video of crazy God on bilibili 1.Spring 1.1 INTRODUCTION Spring framework is an open source J2EE application framework. It is a lightweight container for managing the life cycle of bean s. It solves many common problems encountered by developers in J2EE development. In short, the purpose of Spr ...

Posted by predator12341 on Mon, 07 Mar 2022 20:31:57 +0100

Project 1 online communication Platform-2 Development of communication community registration and login module - 6 Interceptor - display login status information

Refer to Niuke advanced project tutorial 1. Functional requirements for displaying login information Functions to be realized: Users should display different header information when accessing the page in two states: not logged in and logged in That is, not logged in status: Visit the home page, with login and registration ...

Posted by scristaldi on Mon, 07 Mar 2022 16:12:49 +0100

c++ day13 polymorphism, calculator class case (new creation object)

1. Basic concepts Polymorphisms fall into two categories Static polymorphism: function overloading and operator overloading belong to static polymorphism and reuse functionsDynamic polymorphism: derived classes and virtual functions implement runtime polymorphism Difference between static polymorphism and dynamic polymorphism Statically poly ...

Posted by sivarts on Mon, 07 Mar 2022 14:28:28 +0100

Introduction to GO language foundation

This article mainly summarizes the basis of Go language and its related special grammar. Unlike Go build, Go run does not create executables. Therefore, in the development stage, use the command go run. When sharing after development, use Go build.At the beginning of its creation, Go language was used to develop high flow production system.In ...

Posted by warydig on Mon, 07 Mar 2022 13:04:59 +0100

[Lua from bronze to the king] Chapter 5: Lua operator

Catalogue of series articles preface ๐ŸŒฒ 1, Lua operator An operator is a special symbol that tells the interpreter to perform a specific mathematical or logical operation. Lua provides the following operator types:Arithmetic operatorRelational operatorLogical operatorOther Operators ๐ŸŒฒ 1. Arithmetic operator 1. Grammar The f ...

Posted by Aliz on Mon, 07 Mar 2022 09:22:20 +0100

SpringBoot-21-Mybatis multi data source configuration

SpringBoot-21-Mybatis multiple data sources As we mentioned earlier, there are two ways to generate Mybatis Code: Mybatis Genenrator Mybatis code generation Mybtais Plus MyBatisPlus code generation The JdbcTemplate and spring boot data operation databases were also introduced earlier JdbcTemplate multi data source configuration Spring ...

Posted by Ree on Mon, 07 Mar 2022 04:53:58 +0100

"Python" 8 tips to improve the quality of Python code

enumerate() instead of range(len()) Problem: traverse a list and set the value less than 0 to 0. Traversing the list is an operation often involved in the development process. Most Python developers are used to using range(len()) syntax, which is introduced in many tutorials and books. Therefore, many students choose to use this method to tr ...

Posted by dennyx on Mon, 07 Mar 2022 03:11:35 +0100

Mobile phone number validation latest regular expression

Generally, the form page needs to fill in the mobile phone number. To verify whether the mobile phone number entered by the user is correct, we need to use the regular expression to match the mobile phone number segment. If it is in the operator number segment, the number is correct. Therefore, it is necessary to know the latest segment number ...

Posted by dila125 on Mon, 07 Mar 2022 02:04:50 +0100

In those years, we learned the common notes of mybatis plus (12)

๐Ÿ‘ About the author: Hello, I'm cabbage ~ ~, a sophomore in school, and a new star creator in the Java field.๐Ÿ“ Personal homepage: Cabbage CSDN blog๐Ÿ“ง If there are mistakes in the knowledge points of the article, please correct them! Learn and make progress with you ๐Ÿ‘€๐Ÿ”ฅ If you feel the blogger's article is good, please ๐Ÿ‘ Three company support ๐Ÿ‘ Che ...

Posted by eyaly on Sun, 06 Mar 2022 22:22:30 +0100